AIDS is a fast spreading , incurable disease. It is a serious health problem that threatens the entire human population.
It was first noticed in USA in 1981.
It is a disorder of immune system. It is caused by Retro -Virus HIV.
This virus weakens the human body's immune system ,i. e. self defence mechanism.
AIDS is transmitted only by a contact of infected cells containing blood of patient with the blood of a healthy person.
The various means through which it can be spread are as follows :-
- unprotected sexual intercourse.
-use of contaminated needles ,razors .
-mother to baby due to rupturing of blood vessels at the time of birth.